Illustrated catalogue and price-list of drawing and tracing papers, sun print papers and equipments, drawing instruments and materials, surveying instruments, accessories, etc / Kolesch & Company. . und glass shades attached to both verniers. Compass, divided on Solid Silver to half degrees, with improved barneedle, 4l/2 inch. With variation plate and capstan head for setting same. Vertical Arc, 5 in. graduated on Solid Silver to 30 minutes with vernierreading to 60 seconds. Weight of instrument without tripod, 13 lbs. Instrument complete, in finely polished box, with plumb bob,reading glass,
Illustrated catalogue and price-list of drawing and tracing papers, sun print papers and equipments, drawing instruments and materials, surveying instruments, accessories, etc / Kolesch & Company. . und glass shades attached to both verniers. Compass, divided on Solid Silver to half degrees, with improved barneedle, 4l/2 inch. With variation plate and capstan head for setting same. Vertical Arc, 5 in. graduated on Solid Silver to 30 minutes with vernierreading to 60 seconds. Weight of instrument without tripod, 13 lbs. Instrument complete, in finely polished box, with plumb bob,reading glass, center key, adjusting pins, gossamer bag and tripod No. 7400 - each ?215-00 7612 Same as No. 7610, but with horizontal limb plate 6l/2 in., and compass needle, 5 inch .each, $ Optional Additions to Either of Above Transits, To Order Only. 20 seconds verniers, instead of 30 seconds ^Innn Astronomical (inverting) eye-piece, instead of erecting Three leveling arms, instead of four ;r;\ JS Magnifying glasses attached to verniers on limb plate 60 seconds verniers, at same price as Nos. 7610 and 7612. ^- OUR IRON CLAD GUARANTEE, see page 196. 222 KOLESCH <fc CO. $*K\ NEW 7622 Extra Fine Quality Transit, with Vertical Circle.(For description see page 223.) KOI^ESCH <fc CO. NEW YORK. 223 Kolesch Transit No. 7620 Extra Fine Quality. 7620 Extra Fine Quality Transit for high-grade work requiringextreme accuracy and precision. Bent Standards. With powerful achro-matic terrestrial (erecting) telescope about 11 inches long. Magnifyingpower 24 diameters. Will focus 5 or 6 feet from the instrument,which is very convenient on short offsets. Lenses are especially made andselected by the best European optical works. Aperture of object glass1 3/16 inches. Dust Cap and Sun Shade. Improved rack and pinion move-ment to eye-piece and objective. Fine bubble (4*4 in. vial) of 30 secondssensitiveness, graduated on the glass and attached to the extreme end oftelescope. This
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Keywords: ., bookcentury1900, bookdecade1910, bookidillustratedc, bookyear1917
